Choice architecture can be applied to various domains where people face choices that affect their health and well-being, such as health, finance, and environment. In the health domain, choice architecture can help people adopt healthier habits, like eating more fruits and vegetables or exercising regularly, by placing healthier foods at eye level, offering smaller portions, displaying calorie information, making gym memberships automatic, or sending reminders and rewards. In the finance domain, choice architecture can help people improve their financial literacy, save more, invest wisely, or avoid debt by enrolling them in retirement plans by default, offering matching contributions, simplifying financial products, providing financial education, or sending nudges and alerts. Lastly, in the environment domain, choice architecture can help people reduce their environmental impact by setting energy-efficient appliances as the default, showing social norms and comparisons, providing green labels and certifications, charging fees for plastic bags, or offering discounts and rewards.